.bg-brand-dark {
  background-color: #0d1b2a;
}

.bg-brand-primary {
  background-color: #0d6efd;
}

.text-brand-primary {
  color: #0d6efd;
}

.hero-section {
  background: linear-gradient(180deg, #0d1b2a 0%, #1b263b 100%);
}

.card-hover:hover {
  transform: translateY(-5px);
  transition: all 0.3s ease;
}

/* Vertical Course Navigation Menu */
.course-menu .course-menu-item {
  cursor: pointer;
  padding: 14px 18px;
  border-radius: 10px;
  margin-bottom: 10px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  font-weight: 600;
  color: #334155;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.course-menu .course-menu-item:hover {
  background: #f1f5f9;
  color: #0d6efd;
  border-color: #cbd5e1;
}

.course-menu .course-menu-item.active {
  background: #0d6efd;
  color: #ffffff;
  border-color: #0d6efd;
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.25);
}

.course-card {
  display: none;
}

.course-card.active {
  display: block;
  animation: fadeIn 0.35s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 992px) {
  .course-menu {
    position: sticky;
    top: 100px;
  }
}

/* Scroll To Top Button */
#scrollToTopBtn {
  position: fixed;
  bottom: 25px;
  right: 25px;
  z-index: 99;
  width: 48px;
  height: 48px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

#scrollToTopBtn.show {
  opacity: 1;
  visibility: visible;
}

#scrollToTopBtn:hover {
  transform: translateY(-3px);
  background-color: #07294d;
  border-color: #07294d;
}

.bg-brand-dark {
  background-color: #0d1b2a;
}

.bg-brand-primary {
  background-color: #0d6efd;
}

.text-brand-primary {
  color: #0d6efd;
}

.contact-hero {
  background: linear-gradient(rgba(13, 27, 42, 0.85), rgba(27, 38, 59, 0.85)), url('../images/slider/s-1.jpg') center/cover no-repeat;
}

.info-card {
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  transition: all 0.3s ease;
}

.info-card:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

.form-cta-card {
  background: linear-gradient(135deg, #07294d 0%, #0d1b2a 100%);
  border-radius: 20px;
}

#scrollToTopBtn {
  position: fixed;
  bottom: 25px;
  right: 25px;
  z-index: 99;
  width: 48px;
  height: 48px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

#scrollToTopBtn.show {
  opacity: 1;
  visibility: visible;
}

#scrollToTopBtn:hover {
  background-color: #07294d;
  border-color: #07294d;
}